Скачать или смотреть Removing impurities from water||Purify turbid water||colloidal solution||BSc||NEET

ALUM IS USED AS A FLOCCULANT TO REMOVE UNWANTED COLOUR AND TURBIDITY FROM WATER SUPPLIES. IT HAS BEEN USED SINCE #ANCIENT #TIMES FOR THIS PURPOSE AND ITS USE TOGETHER WITH #FILTRATION IS STANDARD PRACTICE IN #CONVENTIONAL #WATER #TREATMENT #PROCESSES #AROUND THE #WORLD .
#Alum is used to #purify water or to #remove the #hardness of the water. Its #usage has been #popular from a #long ago till now because it is a readily available and #inexpensive way to #clean turbid water.
Make an alum solution by adding 7.5 grams of alum to one liter of #tap water. Then prepare three or four #cups with turbid #soil solution. Add different amounts of the alum #solution to each of the cups (for example zero, one, three and five milliliters ) and stir all of them for two minutes (with help, of course).
Took about five liters of water in a #plastic #bucket and added #half a #teaspoon of #powdered Alum (that is about 50 mg which works out to 10 mg per liter of water) and stirred well. This bucket of water needs to be kept #still for about 6 to 7 hours so that the sediments get coagulated and settles #down at the #bottom .
It has been used to purify turbid #liquids since #antiquity . Alum is used to purify #domestic #wastewater . It is added to water to cause #aggregation of #particles and form flocs.

The use of alum together with #filtration is one of the standard #practices in #conventional water treatment methods. Nowadays, people being more concerned about water sanitation use a candle, aqua, #RO #filters etc., to get the #filtered water.
#Muddy or turbid water is a #colloidal solution containing various suspended particles. The colloidal particles in the water absorb ions and get the same #electric charge (either positive or negative). Thus, particles repel one another and remain dispersed in turbid water.So, to neutralize the electrical charges on the suspended particles, a coagulant is added. The purpose of adding coagulant is to prevent repulsion between the dispersed particles. T he oppositely charged coagulants attract the colloidal particles, resulting in a #neutral charge. As a result, the particles no #longer repel each other.
Next, #Van der Waal’s #forces will cause the particles to #drift together, forming a precipitate. Once enough particles #merge together, they become floc and will #sink to the bottom.
#potash
#bsc
#neet #cuet #jee #icar #physicalchemistry #physical Removing impurities from water||Purify turbid water||colloidal solution||BSc||NEET @BipChemTech ​